polynominal logo
Synthesizers Drum machines Samplers Effects 8-16bits+ toys HOME

RSF Kobol

 

 

 

rsf kobol

  audio demo trend price : 5000-7000€
demo video comments

RSF KOBOL keyboard (1978)



The legendary French monophonic synthesizer made by the great Fernandez team Ruben and Serge Fernandez. Keyboard version is one of the rarest version ever made: only 200 have been produced, resulting as one of the most sought-after synthesizer in the world.

rsf kobol logo

french synth

info KEYBOARD (weight:10 kg) 44 keys.
This main panel features 28 knobs, 5 switches and 15 buttons. On the leftmost part there there are 2 wheels for modulation and pitch control.

Front panel terminal connectors:
- audio out at high / low impedance
- control voltage for VCO
- control voltage for VCF
- gate control
- external audio process line input
- clock trigger input



edit VOICE monophonic machine based on subtractive synthesis.
A voices is composed by 2 syncable oscillators with individual settings:
- 4 octaves height
- volume
- tuning

 

rsf kobol wave


editOSCILLATORS voice board generates 7 main waveforms with intermediate shapes:
- triangle
- saw
- saw 2X
- various % rectangle pulses

TECH: the waveform transition is smooth and very harmonics.


waveform

waveform




filter FILTER the VCF is a 4 poles resonant (up to auto-oscillation) filter based on SSM-2040 chip.
A keyscale function on filter can be engaged.



adsr ENVELOPE 2 EG generators each with a 2- stages ADS:
- EG1 VCF
- EG2 VCA

Special bypass switch activates the VCA drone mode.


lfo LFO
a single oscillator (tri / sqr) modulates 2 destinations:
1- VCO pitch
2- VCF cutoff



filter PERFORMANCE some handy functions for:
- glide legato mode switch
- decay on/off
- keyboard octave selector
- cutoff knob

board rsf kobol


lfo CV some stages can be controlled by external tensions (1V/oct) such as:
- VCF filter cutoff
- VCO pitch with GATE



sequencer SEQUENCER a 2X 8 steps with internal frequency rate controlled by relative LFO potentiometer.



sequencer SYNC internal clock tempo can be set using the LFO frequency or sync mode to external +5V trigger input to arpeggiators modules like Elka Synthex or drum machines clocks like Roland Tr-808.



memroy MEMORY :
- 16 memory slots
The memorized sounds can be also be played in sequence rotate, damn nice for some electro patterns also syncable to external trigger input clock. RAM is retained when switched off with a dedicated Cmos-chip like 5101 based board "programmeur" and a battery is soldered to it - just check out for acid leak.

original scan

MEMORY BOARD click to enlarge

5151 memory chip



midi FAMILY RELATED

rsf Kobol Expander

There are various KOBOL releases with different white knobs and a special custom version with.... accordion keys--gosh

rsf Kobol Expander

EXPANDER I the Kobol exists also in rackmount version, with more CV routing but lacks the great sequencer with sound rotate.


EXPANDER II a module add-on with some new features like ring modulation, Sample and Hold, Envelope follower with many CV OUTS.

RSF Polykobol II

RSF Polykobol II (1983) polysynth. A total disaster production and highly unreliable, this doomed machine sents the RSF company out of business. VIDEO

MOS-LAB KOBOL EXPANDER

MOS-LAB KOBOL EXPANDER a modern remake.
I did not try this out but seems to be quite expensive. VIDEO

vco kobol MOS LAB 980 KOBOL VCO - clones oscilaltor for modular project
rsf kobol VST RSF KOBOL VST PLUGIN: nothing for now, no samples libraries neither.


demoAUDIO DEMO

rsf kobol audio demo



 

midi DEMO

SOON STAY TUNED!

KOBOL under rcalibration




effet Soundcloud RSF Kobol

demo1 3 tracks 3 tracks  


videoVIDEO CLIP SELECTION

RSF Kobol memory test RSF kobol synthesizer
voici l'engin! memory test ZE kobol!


rsf kobol audio demo

 

 


KOBOL MANUAL

manual
We do not have it, but there is an ONLINE version in FRENCH.




KOBOL SCHEMATICS

manual
IF you HAVE schematics or service for KOBOL keyboard, please get in touch for free sharing.

 

 


original scan

 

 

 

original scan

 

 

 

original scan

 

 

 

for sale
FOR SALE: NOT AVAILABLE

 

 

 

raf kobol back panel Lfo made in france


manual

- holy grail
- powerful

-incredible sequencer

manual

- expensive
- hard to find

comment


Review "A strike of genius: smart, powerful, fast, deep, beautiful...THE FRENCH TOUCH!"

 

COMMENTS

 

polynominal logo
      For sale Comment Contact
Synthesizers Drum machines Samplers Effects 8-16bits+ toys HOME

all snapshots, sounds, texts copyright Polynominal.com / Eric Pochesci

rsf kobol 4 out of 5 based on 14 ratings. price €?